Aromatic polysulfone and aromatic polysulfone composition

Abstract

The invention provides an aromatic polysulfone including an aromatic polysulfone having at least one highly polar functional group at its terminus, wherein in the aromatic polysulfone, an area of a signal attributed to the aromatic polysulfone having a highly polar functional group with respect to a total area of all signals attributed to the aromatic polysulfone in a chromatogram obtained by measurement through a gel permeation chromatography method under the following conditions is 0.1% or more and 11% or less, wherein the sample injection volume is 5 μL, column is “Shodex KF-803” manufactured by Showa Denko K.K., column temperature is 40° C., eluent is N,N-dimethylformamide, eluent flow rate is 0.5 mL/min, detector is ultraviolet-visible spectrophotometer (UV), and detection wavelength is 277 nm.

The invention claimed is: 
     
       1. An aromatic polysulfone comprising an aromatic polysulfone having at least one highly polar functional group at its terminus,
 wherein the highly polar functional group is a polar functional group having an acid dissociation constant smaller than that of a carboxyl group, and 
 wherein in said aromatic polysulfone, an area of a signal attributed to said aromatic polysulfone having a highly polar functional group with respect to a total area of all signals attributed to said aromatic polysulfone is 0.1% or more and 11% or less in a chromatogram obtained through a gel permeation chromatography method. 
 
     
     
       2. The aromatic polysulfone according to  claim 1 , which comprises a repeating unit represented by a formula (1),
   -Ph 1 -SO 2 -Ph 2 -O—  (1)
 
 wherein Ph 1  and Ph 2  each independently represent a phenylene group, and one or more hydrogen atoms in said phenylene group may be each independently substituted with an alkyl group, an aryl group or a halogen atom. 
 
     
     
       3. The aromatic polysulfone according to  claim 2 , which comprises 0.5 to 10 phenolic hydroxyl groups per 100 repeating units represented by said formula (1). 
     
     
       4. An aromatic polysulfone composition comprising the aromatic polysulfone according to  claim 1 . 
     
     
       5. The aromatic polysulfone composition according to  claim 4 , further comprising a filler.